摘要
以高度级为参考坐标 ,应用衡量优势种群及群落结构动态的失稳率、群落垂直空间的分享度、α -多样性及群落高度级梯度β -多样性等指标对中亚热带丝栗栲次生林群落高度级结构特征及其动态进行分析评价 .结果表明 :丝栗栲群落及其优势种群个体数、群落物种数和种对级的分享度随高度级增加都呈下降趋势 ;各高度级物种数和个体数呈明显的正相关关系 ;级间失稳率显示 ,群落在第 2、3、6、7高度级呈增长趋势 ,第 4、5高度级呈衰退趋势 ,群落整体具有增长性结构 ;群落随高度级形成丰富度指数 (dMa)、Shannon -Wiener指数 (H)逐渐降低 ,均匀度指数 (J)先增后减的变化趋势 ;随高度级梯度的增加 ,群落相邻高度级间Whittaker指数 (βw)呈上升趋势 ,而Morisita -Horn指数 (CMH)呈不规则地跳跃式变化 ,表现了共有种在群落不同高度级的数量差异 .图 3表 2参
The highness class structure of Castanopsis fargesii secondary forest in the middle subtropic was measured and analyzed. When the community highness classes was regarded as coordinate axis, a series of targets, e.g. lost stable rate of individual number between highness classes and species sharing degree, α-diversity, and β-diversity were applied to examine structure characteristics and dynamics of the community. The results indicated that the individual number of the community and its dominant, species number and sharing degree decreased as highness classes raised; there was a significant positive correlation between species abundance and numbers of individual in different highness classes; the community was developing in the 2nd,3rd,6th and 7th highness class, while degenerating in the 4th and 5th showed by stable rate between classes, and the whole community was evolving; species abundance index (d Ma) and Shannon-Wiener index (H) increased, and Pielou index (J) increased first, then decreased with the highness going up; Whittaker index (β w) was climbing and Morisita-Horn index (C MH) was waving following highness class up,which inflected diversity of mutual species individual quantity of neighboring highness class. Fig 3, Tab 2, Ref 15
出处
《应用与环境生物学报》
CAS
CSCD
2003年第5期460-464,共5页
Chinese Journal of Applied and Environmental Biology
基金
福建省科技厅重大资助项目 (2 0 0 1F0 0 7
2 0 0 1Z0 2 5)
福建省自然科学基金资助项目 (B0 0 1 2 1 )~~
关键词
中亚热带
丝栗栲
次生林
群落结构
高度级结构
Castanopsis fargesii
secondary forest community
highness class structure
